While hybrid, plug-in hybrid and full electric cars largely remain niche vehicles, representing less than three percent of all vehicles sold nationally, 15 U.S. cities combine to account for nearly 30 percent of all hybrids and 41 percent of all electric vehicles on the road according to R.L. Polk & Co. in Southfield, MI. And that’s despite those areas being responsible for just 12.5 percent of all new-vehicle registrations.

“Nine of these 15 hybrid-rich areas have a hybrid penetration greater than six percent,” explains Polk advisor Tom Libby. “In San Francisco, the market area with the highest hybrid mix, almost one of every 10 new vehicles sold is a hybrid.” Los Angeles and San Francisco feature the highest concentration of plug-in vehicle buyers in the nation, with those two cities alone responsible for a quarter of all electric-car sales. We’re highlighting the top 10 cities having the most hybrid and electric models in the accompanying slide show.

Perhaps not surprisingly, given the region’s ecological predilections, the cities responsible for the highest concentration of hybrid and electric vehicles are largely located on the West Coast. In addition to S.F. and L.A. these include: Monterey, Santa Barbara, San Diego, Eureka, Chico, Palm Springs and Sacramento, CA; Eugene, Portland, Bend and Medford OR; Portland, WA; and Tuscon, AZ.

The cities having the lowest percentage of electrified car registrations tend to be situated squarely in the pickup truck-loving central and southern regions. Tulsa, OK is responsible for the biggest dearth of hybrids and electrics at just 0.58 percent and a scant 0.01 percent of all registrations, respectively. Other cities with the fewest hybrid or battery-powered cars include: Lafayette and Lake Charles, LA, Odessa-Midland, TX; Glendive, MT; Minot-Bismarck, ND; and Greenwood-Greenville, SC.

Still, electrified vehicle sales remain on the upswing. For example, the venerable Toyota Prius line of hybrid and plug-in hybrid cars continues to handily beat all comparable comers across the U.S., with combined sales among its four model variations registering 236,659 units last year, representing a 73.4 percent increase. That makes it the 13th best-selling vehicle in the nation, and as a nameplate onto its own, Prius outsells many stalwart brands, including Toyota’s own Lexus division.